Most people agree that, when it comes to exercise, the harder you train, the fitter you become. But did you realise when you exercise also matters? ____1____

Many people think the morning is the best time for exercise, because they have more energy then and they feel less and less active as the day progresses. ____2____ Our bodies have natural rhythms (节律), so the best time of day to exercise is different for different people.

It also depends on what your goal is. Recent research suggests that the higher your body’s temperature, the better your performance. ____3____ So it could be the best time for a workout. However, if you want to lose weight, the best time of day to exercise is early in the morning. ____4____ And if your aim is simply to keep physically healthy, then a long walk is OK — at any time of day.

Be careful, though. ____5____ You would like to train harder and harder as you start to feel fitter, but remember that the more you exercise, the higher the risk of getting hurt. Overall, it’s far safer to do a small amount of exercise regularly (规律地). Your workout will be a little easier each day, and as you get fitter, it will become more and more enjoyable.

A. We should keep exercising every day.

B. However, it is not quite as simple as that.

C. That’s when your body will burn most energy.

D. It can be as important as how much exercise you do.

E. Most people’s temperature is highest in the late afternoon.

F. Doing too much exercise can be almost as bad as not doing enough.

1.1.

A

B

C

D

解析：选D。句意：它可能和你的运动量一样重要。前文提到大多数人认为训练越刻苦身体越好，但你有没有意识到锻炼的时间也很重要。D选项中的It指代前面的when you exercise（锻炼的时间），承接上文话题，故填D。

2.2.

A

B

C

D

解析：选B。句意：然而，事情并没有那么简单。上一句很多人认为早上是最佳锻炼时间；下一句讲我们身体有自身节律，最佳时间因人而异。前后形成转折，否定“早上就是最好时间”这个片面看法，故填B。

3.3.

A

B

C

D

解析：选E。句意：大多数人的体温在傍晚达到最高。前文研究表明：体温越高，运动表现越好；后文“所以这可能是锻炼的最佳时段”。E给出体温最高的时间段，构成因果逻辑，故填E。

4.4.

A

B

C

D

解析：选C。句意：那是你的身体消耗最多能量的时候。前文说如果你想减肥，最佳锻炼时间是清晨。C 项解释为什么适合减肥，that指代early in the morning，说明清晨消耗能量最多，故填C。

5.5.

A

B

C

D

解析：选F。句意：运动过量几乎和运动不足一样糟糕。下文说你身体变好后总想加大训练量，但运动越多受伤风险越高。F引出运动过量这个隐患，开启下文告诫，故填F。